3,4′-ODA, also known as 3,4′-oxydianiline or 3,4′-diaminodiphenyl ether, is an asymmetric aromatic diamine used in polyimide synthesis.
JLON supplies 3,4′-ODA in 99% and 99.5% purity grades to meet different formulation requirements and purchasing budgets. Customers can select a grade according to their polymerization process, impurity limits and end-use requirements.
| Property | Information |
|---|---|
| Product name | 3,4′-Oxydianiline |
| Alternative name | 3,4′-Diaminodiphenyl Ether |
| Abbreviation | 3,4′-ODA |
| CAS number | 2657-87-6 |
| EC number | 220-190-0 |
| Molecular formula | C12H12N2O |
| Molecular weight | 200.24 g/mol |
| Chemical category | Asymmetric aromatic diamine |
| Appearance | Brown to off-white powder, depending on grade |
| Available purity grades | ≥99.0% and ≥99.5% |
The selected grade, analytical method and additional quality limits are confirmed in the quotation.
3,4′-ODA contains two aromatic rings connected by an ether linkage. One amino group is positioned meta to the ether linkage and the other is positioned para.
This asymmetric structure changes polymer-chain geometry compared with symmetric diamines. It makes 3,4′-ODA relevant to the development of aromatic polyimides where processability, chain packing and thermal performance must be balanced.
The final properties depend on the dianhydride, molecular weight, end groups and polymer processing route.
3,4′-ODA is used as a comonomer in ether-containing copolyaramid fibers. These fibers are used in industrial ropes, reinforced hoses, timing belts, protective textiles and composite reinforcement, where strength, flexibility and fatigue resistance are important.
3,4′-ODA is used in polyimide fiber synthesis, including melt-processable polyimide formulations. It provides a diamine building block for manufacturers developing fibers with a balance of heat resistance, mechanical properties and processability.
| Parameter | 3,4′-ODA | 4,4′-ODA |
|---|---|---|
| CAS number | 2657-87-6 | 101-80-4 |
| Amino-group positions relative to the ether linkage | Meta/para | Para/para |
| Structural arrangement | Asymmetric | Symmetric |
These are different chemical substances. They should not be treated as interchangeable without formulation evaluation.
Please include CAS 2657-87-6 in your inquiry to identify the required product accurately.
Key purchasing considerations may include:
Purity and analytical method
Isomer composition
Amine assay or equivalent information
Water content
Residual solvents and organic impurities
Color and solution clarity
Metal or ionic impurities where relevant
Polymerization consistency across batches
A higher purity percentage does not automatically establish suitability for every application. Individual impurity limits and process validation may be equally important.
Keep the material tightly sealed and follow the Safety Data Sheet for the supplied grade. Confirm the recommended storage conditions, shelf life and handling precautions before use.
If color stability or solution quality is critical to your process, include these requirements in the purchasing specification.
3,4′-ODA is an aromatic diamine used in polyimide synthesis, including the development of thermoplastic resins, films, coatings, adhesives, composite matrices and research membrane materials.
JLON offers ≥99.0% and ≥99.5% purity grades. Pricing depends on the selected specification, quantity and delivery requirements.
No. They have different substitution patterns and CAS numbers. The CAS number for 3,4′-ODA is 2657-87-6.
No. Melt processability depends on the complete polymer structure, molecular weight and processing conditions.
Suitability must be established through formulation testing and agreed impurity limits. Monomer purity alone does not guarantee optical transparency, dielectric performance or electronic-grade qualification.
Please provide:
Required purity grade
Intended polymer or application
Analytical and impurity requirements
Trial quantity and estimated annual demand
Packaging requirements
Delivery destination and required delivery date
Contact JLON to discuss 3,4′-ODA specifications, sample requirements and pricing.
